I’ve seen websites say during checkout “your address wasn’t in our db but this one was” showing what was clearly a cleaned up form (changed “Circle” to Cir, uppercased, turned ZIP into ZIP+4) so there are ways.

You would have to tell the user “use the corrected/matched one only” though. Some sites offer the correction but don’t make you use it.

The downside is this service is not up-to-the-minute accurate. I rented a new-construction house and it was the better part of a year before it made it into the USPS address correction database, despite receiving mail just fine.

Might be acceptable collateral damage, but it’d exclude some people.

Unfortunately I've had websites strip out the house number in the "cleaned up" address.